Steering gear



March 19, 1940. A. JIVKOVITCH STEERING GEAR Filed Feb. 18, 1937 5 Sheets-Sheet 1 J ue for: b i. M 24 fl/forney:

Mam! 1 A. JIVKOVITCH- 2,193,927

STEERING GEAR Filed Feb. 18,. 1937 5 Sheets-Sheet 2 March 19, 1940. A. JIVKOVITCH STEERING GEAR Filed Feb. 18, 1937 5 Sheets-Sheet 3 Jnuen/or:

March 19, 1940. A. JIVKOVITCH 2,193,927

' STEERING GEAR Filed Feb. 18, 1937 5 Sheets-Sheet 4 March 19, 1940. A. JIVKOVITCH STEERING GEAR Filed Feb. 18, 1957 5 Sheets-Sheet 5 i no $1184 I760 Patented Mar. 19, 1940- uuirso stars...

earsvr civics STEERING GEAR Alexander.- Jivkcvitch, Beograd, Yugoslavia Application February is, 1937, Serial bio-125,508

In Yugoslavia February 28, 1935 7 Claims. (01. roa -9e) My invention relates to improvements in steer ing gears, and the object of the improvementsis to'provide a gear by means of which resultant movements of at least two variable controlling devices are obtained, and which are simple in con struction and reliable in operation. With this ob- 1 'J'BCU in view my invention consists providing a gear comprising a member having a curved surface and a body slidablethereon, the said member being controlled by the said controlling devices.

Thereby the movement of the said body depends Cpl ' modification in which the body provided, with acurved surface takes the. form of a slide adapted all the views to indicate corresponding parts.

said drawings:

. in Fig. 1 partly several on the resultant of the movements of the aforesaid. controlling devices and on the shape o'f the said curved surface. v

ihe may be used in various arts. For example it may be used for controlling the supply of fuel to internal combustion engines, in which case the operation of one of the said controlling devices depends on the number of revolutions of the engine and the operation of the-other one on the position of the throttle valve controlling the'supply of air to the engine, the said body which is in sliding engagement with the said curved surface controlling the supply of fuel to the engine.

For the purpose of explaining the invention several examples embodying the same have been shown in the accompanying drawings in which the same reference characters have been used in In Fig. l is an elevation partly in section showing thecontrolling device,

Fig. 2 is a rear elevation of the gear illustrated in section taken on the line 2-2 Of Fig. 1,

Fig, 3 is a somewhat diagrarnmatical perspective View showing a modification used -in-connection with a steer-rig mechanism controllingthe fuel supplyto an internal combustion engine,

Fig. 4 is asimilar perspective View showing another modification in which rocking and sliding movements may be imparted to the body provided withthecurved surface, I f 5 and 6 are respectively an elevation and aplan viewof another-modification in which the member controlled by the gear isadapted to be positively moved in opposite directions by a body provided with two curved surfaces,

Fig. 7 is an elevation showing a gear comprising devices for producing r sultant movements, g

Fig. 8 is perspective vieu showing another to bemoved in crossing directionsby two other slides, Y

Figs. 9 and 10 are perspective viewsshowing the slides illustrated in Fig. 8. and

Figs. 11 and 12 are diagrammatical plan views showing the different positions of thegea'r il-. lustrated in Fig. 8. r

"In the construction shown in Figs. 1 and 2, the

gear comprises a rocking member 5, which substantia'lly has the form. of an obtuse cone having its smaller base face located at its bottom. The said member l is mounted by means of a universal joint comprising pivot bolts 2 and 3 and'bails 4 and 5 on a bearing block 6 fixed to a base plate "5. To the top part'of the rocking member La cap it is secured by means of screws 8, the said cap being formed with a curved or convex top face iii, which is shaped as follows From the 1 part i l located at the left hand end of Fig. 1 the radii of curvature of the curved surface It, which begin from the axis of the pivot bolts a, are gradu-- ally increased to the right hand part [2 of the said surface, and in a similar way beginning with the part 53 located at the left hand side of Fig.

2 the radii of curvature of the curved surface 18' which begin from the axis of the pivot bolts 2 are gradually increased to the right handpart l4.

Otherwise the shape of the convex surface ID depends on the function to be imparted to the body or operation to be controlled."

To the median part of the rocking member I i a block it formed with a spherical socket is fixed by means of a pin ii, the axis of which is located in the same plane as the axis of the pivot bolts spherical head 23 of a steering rod 22. Thus byreciprocating movement of the steering rod l8 the rocking member iis rocked about the pivot bolts 3,-and'by the reciprocating .movement of the steering rod 22 it is rocked about the pivot bolts 2. v

To a stationary part Z-l a bracket 25 is fixed. which has a bell crank lever 27!, 23 mounted on a pivot bolt 25. The arm 2? of the said bell crank."

lever carries a head 28 Ihaving a spherical surface, and the arm 28 is connected by means of an eye Bil to one end of a spring 3!, the opposite end of which is attached to a bolt 32 having a square cross-section. The said bolt 32 is shiftable in a hole 33 of a fixed block 34, which hole is likewise square in cross-section, and the bolt is adapted to be set into position within the hole 33 by means of a set screw 35 for varying the tension of spring 3|, the said screw nut tending to hold the head 29 of the arm 2! in engagement with the curved surface [8 of the rocking member I.

To a pivot bolt 36 carried by the free end of the arm 28 a rod 31 is jointed which is connected with the member to be controlled by the gear.

It is not necessary to arrange the steering rods l8 and 22 exactly at right angles, but they must be displaced relatively to each other at an angle of less than 180.

The operation of the gear is as follows:

When the rocking member I is rocked by means of the steering rods l8 and 22 the curved face I slides relatively to the head 29. If, for example, the rod i8 is shifted to the left in Fig. 1, the rocking member I is rocked about the pivot bolts 3 into a position in which a higher portion of the curved face lll engages the head 29. Therefore the head 29 is moved upwardly, and the bell crank lever 2'1, 28 is rocked anticlockwise, so that the driven rod 3'! is shifted to the left in Fig. 1. According as the steering rod i8 is shifted a greater or smaller length, also the bell crank lever 27, 28 is rocked more or less in accordance with the shape of the surface Hi. In a similar way the head 29 is moved when the steering rod 22 is shifted, for examplato the left in Fig. 2, thus rocking the rocking member l about the pivot bolts 2. The bell crank lever 21, 28 is rocked anticlockwise in the manner just described, at a greater or smaller angle, according as the steering rod 22 is moved through a greater or smaller angle, the rocking movement of the bell crank lever also depending on the shape of the curved sur face It). The driven rod 3'! is shifted accordingly by the bell crank lever 21, 28.

When both steering rods I8, 22 are moved in one or the other direction a resultant rocking movement is imparted to the rocking member I and the said resultant movement is transmitted through the intermediary of the bell crank lever 21, 28 to the driven rod 31. Therefore the driven rod 37 is controlled in dependence of the resultant of the movements of the steering rods 18, 22 and also in dependence of the shape of the curved face ID of the rocking member I, the said rocking member 5 providing a control ling device intermediate the steering rods I8, 22 and the driven rod 31.

The construction and arrangement of the steering rods, the driven rod, the rocking memher, and the curved face may be varied in dif ferent ways without departing from the scope of the invention.

Where it is necessary to combine the resultant values from more than two controlling members a plurality of the gears described above may be coupled with one another, for example, by connecting the arm 28 of the bell crank lever with the steering rod is or 22 of the next gear.

The movement resulting from the operation of the aforesaid devices may also be affected by shifting the bearing block 6, or the bracket, or the bearing 6 and the bracket 25.

The universal joint 2 to 5 may cooperate with a second rocking member similar to the first named rocking member I, the said steering rods l8 and 22 acting on a plurality of curved surfaces and a plurality of mechanical members cooperating with the said faces. Thus this modification comprises a gear equipped at least with two curved faces. In the construction of the gear shown in Fig. 1 the steering rods i8, 22 may be connected with controlling members of apparatus used in various arts, while the driven rod 31 is connected with the controlled device of the said apparatus. Thus for example measuring instruments, calculating apparatus, apparatus for supplying fuel to internal combustion engines and the like, which must be set in accordance with a plurality of variable factors, may be set by means of the aforesaid devices. Further the said apparatus may be used, for example, in the broadcasting art for controlling a circuit in accordance with a variable capacity and a variable self-induction. The resulting effect of this setting operation may be used by means of additional devices for affecting another value, or it may be transmitted to another device.

In 3 I have shown the manner of controlling the supply of fuel to an internal combustion engine by means of a device of the construction shown herein.

The gear comprises a rocking member of the type described above. In the construction shown in the figure the said rocking member takes the form of a rod 73 which carries at its top end the head 9 formed with the curved surface l0, and which is mounted at its bottom end by means of the universal joint 2 to 5 on a bearing 72 carried by an arm 15 of an angular bracket 75, 18. The arm 15 is screwed to a pipe l1 forming a part of an internal combustion engine supplying air thereto. The steering rods I8, 22 are displaced with relation to each other at an angle of 90, and they are connected with the rocking rod 13 by means of the universal joints 15, IS and 28, 23. The steering rod lais connected by means of a spherical head 78 with a bearing block 19 having a spherical socket and carried the top end of a lever 88. The said lever 80 is fixed to a shaft 8! which extends through the pipe 1'! and has a throttle valve 82 fixed thereto. To the opposite end of the she! t 8! an arm 83 is fixed which is jointed at 85 with the usual control rod 84.

The other steering rod 22 is connected by a spherical head 86 with a bearing 8'! having a spherical socket and carried by the top end of an arm 88 of a bell crank lever 88, 89. The said bell crank lever is rockingly mounted on a pivot bolt 9D carried by a bracket 9! screwed to the pipe Tl. The arm 89 is bifurcated at its end 92, and the said bifurcated end engages circumferential groove of a collar 93 adapted to be shifted by means of the centrifugal governor 94 of the internal combustion engine.

On a pivot bolt 95 carried by the arm 16 of the bracket 15, 16 a bell crank lever 96, 91 is mounted the arm 38 of which carries a spherical head 98 and is connected by a spring 89 with a downwardly directed portion I08 of the arm 16 the said spring tending to press the head 98 on the curved surface lb. The arm 91 of the bell crank lever is connected by means of a pivot bolt (0| with a link. i 02 jointed to a pivot bolt I63 carried by the usual needle valve 104 passed into the casing I05 of the fuel valve and controlling the supply of fuel to the engine. The said casing is connected with the fuel supply I08 and with a pipe llll' communicating through the pipe ll with the fuel atomizer I08.

The operation of thegear shown inFig. 3 is as follows:

When the throttle valve 82 is set, the rocking member 73 is rocked through the intermediary of the lever 80 and the steering rod It, so that the curved surface Iii. rocks the bell crank lever 96, 91 and thus sets the fuel valve ltd through the intermediary'of the link I02. In a similar way upon a change of the velocity of the engine the bell crank lever. 83, 85 is turned in accordance with the position of the governor 3t, and the said displacement of the bell crank lever is transmitted through the steering rod 22 to the rocking member'IB, so that the fuel valve 5% is likewise set through the intermediary of the curved surface I0. Thus to each combination of the positions of the throttle valve 82 and the governor 8t there corresponds not only the amount of the air drawn in by the engine, but

. also the amount of fuel supp-lied through the fuel valve 104, which amount depends on the shape of the curved surface Ill.

In lieu of the governor 9t controlling the steer-- ing rod 22 any other suitable controlling device may be provided, for example an electromechanical or hydraulic controlling device.

The gear described with reference to Fig. 3 may housed in connection with devices for immediately injecting fuel into the cylinder of engine, or in connection with a carburetter, and in both cases various modifications of the gear may be provided, by means of which the fuel. is supplied either directly or under constant or variable pressure, either by pneumatic, hydraulic, or mechanical means. Where the fuel is directly injected by means of a pump the gear controls I the said pump, and where'the fuel is supplied under constant pressure the gear controls a device for opening and closing the fuel nozzle more or less, or for retarding the supply of fuel,

for example by means of a reducing valve. Where the supply of fuel'is effected under varying pressure the gear is constructed for controlling the said pressure. Further, combined constructions may be provided, for example for simultaneously varying the pressure of the fuel and the opening of the fuel nozzle. The gear may also housed in connection with fuel regulating devices of the type in which the fuel is atomized by means of compressed air, steam, or exhaust In the construction shown in Figs. 1 and 2 a body having a curved controlling surface is adapted to be rocked in two directions by means of the steering devices I8, 22 acting at right angles. In Fig. 4 I have shown a modification in which one of the movements of the said mem-' ber is rectilinear.

As shown in the said figure, the said gear comprises a rocking member ltll which is mounted by means of an arm Ht on a shaft HI having rotary and axial movement in stationary bearings .i I2, H3, and IM. At its left hand end the said shaft is round, and it is engaged by a curved surface H6 formed on an arm ill of a bell crank 'le-ver Ill, Hilwhich is pivotally mounted on a H8 is con stationary bearing H9. The arm nected by a pivot bolt I26 with a steering rod I2I.' Near its right hand end the shaft Iii carries a coiled spring $222 which bears with one end on the bearing II and with its opposite end on ber I21 guided in stationary bearings I30, I3I'by means of pins and slots I28, I29. An arm I32 of the rocking member I 2'I is jointed at I32a to a second steering rod I33.

The rocking member I89 is formed with a curved surface 534 the radius of curvature of which is gradually increased in the direction-of the circumference and from the top part of the surface downwardly. Further, the surface lt l tapers inwardly in the form of a wedge I35 from its right hand end towards its left hand end, the said tapering portion being conical or curved. In the construction shown in Fig. t the thickness of the wedge shaped portion I35 is increased from the left to the right. The surface is engaged by a. laterally bent head litii of an arm Isl forming a part of a bell crank lever 31, #38 mounted on a stationary bearing I559. The arm I38 of the said bell crank lever is jointed at Mil with Fig. 4 is H2, and the shaft I II is shifted by the springv I22 to the left and upwardly, the square portion,

I25 of the shaft I l I sliding within the square hole Hit of the rocking member II. By the said displacement of the shaft ill the rocking member IE9 is shifted in such a way that the bell crank lever I37, list is rocked by the wedge shaped portion I35 in anticlockwise direction and the controlled member Ml is moved upwardly.

When the steering rod I33 is shifted to the right in Fig. i the rocking member 12'! is rocked anticlockwise. The square portion I25 is carried by the said rocking member, so that the shaft 1 H is turned in a corresponding'direction and the rocking member I it is. moved upwardly. Thereby the curved surface I3 5 turns the bell crank lever I37, I38 so that the controlled member MI is moved upwardly. Thus in this case by the combined sliding and rocking movements of the member I09 the driven member I4! is displaced in dependence of the movements of the driving steering rods I2I,' I33.

The modification shown in Figs.'5 and 6 is similar in construction to the example illustrated in Figs. 1 and 2, but the driven member is positively shifted in both directions. The rockingmember M2 shown in Fig. 5 is mounted on the base by means of a universal joint I43. Substantially to the middle of the rocking member I42 steering rods Hit and M7 are connected by means of universal joints HM and i lfi, the said rods being disposed relatively to each other at right angles. The top part N8 of the rocking member It?! is bifurcated and it carries a curved head his. The upper curved surface I59 of the said head corresponds to the curved face Ill of the cap 9 shown in Fig. l. The bottom face liil of the head Its is likewise curved, and it is shaped similarly to the curved surface Hill.

Thecurved head lit is embraced by a bifurcated arm E52 formed with spherical heads I53 and I55, and it is free to rock in any direction between the said heads I53 and I54. The bi-- furcated arm I52 pivot bolt its, and it is made integral with an arm IN to which a driven rod IE8 is jointed is pivotally mounted on a -ment of th steering rod with reference to Figs. 1 and 2. To the head I49 resultant movement is imparted which is composed of the individual movements of the steering rods I46 and M1. By the curved surfaces I56 and I5I of the head I49 the bifurcated arm I52 is pivotally rocked in one or the other direction, so that also the driven member I 58 is positively moved upwardly or downwardly.

In Fig. '7 I have shown a modification in which a plurality of controlling gears cooperate with one another. The said gear comprises rocking members I59a, I591), I590 of a construction similar to the one illustrated in Figs. 1 and 2, the said members being mounted with their bottom ends through the intermediary of universal joints ISIia, I6v'ib, I600 onafoundation I6I. To the rocking members steering rods IGZa, I621), I620 and IBM, I631), 5630 are jointed which are displaced with relation in each rocking member at an angle of 90. The upper curved surfaces I64a, I641), I640 of the rocking members act on bell crank levers I650, I651), I650 which are pivotally mountat IBM, I612), I610. Arms IBM and I661) are connected at IBM, I681) with the links I622) and I620 respectively. The arm I660 is connected with a driven member Hi9. Thus the movement composed of the individual movements of the steering rods I62a, I621), I620 is transmitted to the driven member I69. For example, the move- I62a is transmitted through the rocking member I59a, the bell crank lever I65a, I56a, the steering rod I622), the rocking member I691), the bell crank lever I65b, I662), the steering rod I620, the rocking member I59c, and the bell crank lever I650, I660 to the driven member I69. In a similar way the movements of the other steering rods I63a, I63b, I630 are transmitted to the same steering rod I69.

In 8 and. 9 I have shown a modification in which a member III in the form of a slide is provided in lieu of the rocking member I shown in Figs. 1 and 2, the said member I'II being formed with a convex or otherwise curved surface I'IG. The slide III takes the form of a rectangular plate carrying at its top a head I12 on which the said convex or otherwise curved surface I III is formed. The said curved surface I'Ifl acts on a driven or controlled rod I'I3 which is vertically shiftable in a bail I'I I rising from a base plate I15. 0n the said base plate bearings I76, I'll are mounted.

In the vertical arms of the bail I'I4 a steering slide H8 is horizontally shiftable, and in the bearings I16, III a second steering slide H9 is horizontally shiftable, the said slides being arranged crosswise and preferably at angles of 90. The slides have the same function as the steering rods I 8 and 22 shown in Fig. 1. They are formed with recessed portions I and I8I respectively which embrace the slide Ill, and in the said cranked portions grooves I82 and I83 are provided which engage flanges I84 of the plate III.

The operation of the gear shown in Figs. 8 to 10 will be readily understood from an inspection of Figs. 11 and 12. Fig. 11 shows the median position of the plate Ill. When the steering slide IIB is shifted to the right and the steering slide I19 downwardly and to the left, as seen in Fig. 11, the plate I'll carrying the head I12 and the curved surface I10 is shifted into the position shown in Fig. 12. Thus, in a similar way as has been described with reference to Figs. 1 and 2, movement is imparted to the controlled member I13 which is a resultant of the movements imparted to the steering slides I16 and I19.

I claim:

1. A fuel governing device for an internal combustion engine, comprising a supply of air for supporting combustion, a supply of fuel, a gear comprising at least one interceding device having a curved surface of double curvature and adapted to be operated by at least two devices, for controlling the fuel supply, said interceding device being operatively connected with said fuel supply.

2. A fuel governing device for an internal combustion engine, comprising a supply of air for supporting combustion, a supply of fuel, a gear controlling said fuel supply and comprising a body having a curved surface of double curvature, a member in sliding engagement therewith and moved thereby and operatively connected with said fuel supply, a speed control member for said body, and a second control member for said body controlled by the air supply, said control members acting at an angle to one another for moving said body.

3. A fuel governing device for an internal combustion engine as claimed in claim 2 comprising in addition a centrifugal governor acting on said first named control member, and said member controlled by the air supply is operatively connected with a throttle valve controlling said air supply, and in which the member in sliding engagement with said body is operatively connected with a member controlling the fuel supply.

4. A fuel governing device for an internal combustion engine, comprising a supply of fuel, a gear controlling said fuel supply and comprising a rockingly mounted member formed with a curved surface of double curvature, a member in sliding engagement with said surface to be moved thereby, and control members acting at an angle to one another for moving said first mentioned member.

5. A fuel governing device for an internal combustion engine, comprising a supply of fuel, a control gear, comprising a body having a curved surface, a bearing for said body permitting pivotal and axial movement thereof, control members acting on said body for rocking and axially moving the same, said curved surface being substantially conical in shape and curved about the pivotal axis of said body with varying radii of curvature, and a member engaging said curved surface to be moved thereby to control the fuel supply.

6. A fuel governing device for an internal combustion engine, comprising a supply of fuel, a control gear, comprising a body having two curved surfaces, a bifurcated member straddling said body and engaging said sufaces, and control members for said body acting at an angle to one another for moving said body whereby the said member is moved to control the fuel supply.

7. A fuel governing device for an internal combustion engine, comprising a supply of fuel, a member controlling said supply, means to control said member, several interceding devices operatively located in series between said member and said control means, each of said interceding devices having a surface of double curvature adapted to engage the interceding device next in series in such a manner that the movement caused by one interceding device is transferred to the interceding device following.

ALEXANDER J IVKOVITCH. 

